Question

What is the value of the expression below when x=3
10x²- 7x + 10

Answer 1

92

Explanation:

The variable 'x' shows up twice in this expression. Replace each instance of 'x' with 3:

10(3)^2 - 7(3) + 10 = 10(9) - 21 + 19 = 92

Answer 2

Answer: 79

Concept:

Here, we need to understand the idea of evaluation.

When encountering questions that gave you an expression with variables, then stated: "If x = a, y = b, z = c" (a, b, c are all constants), this means you should substitute the value given for each variable back to the expression.

Solve:

Given information

10x² - 7x + 10

x = 3

Substitute the value into the expression

= 10 (3)² - 7 (3) + 10

Simplify by multiplication

= 10 (9) - 21 + 10

= 90 - 21 + 10

Simplify by subtraction

= 69 + 10

Simplify by addition

= 79

Hope this helps!! :)

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